Righteousness and pure love, yet you ask me to spread demons throughout the world?

He was supposed to be a righteous and pure-hearted young hero, but he accidentally obtained the ultimate evil and chaotic world system.
After that, Fu Hai found that his life had changed.
The eldest junior sister cultivates a mysterious technique called the Shattered Moon Sword, which is actually the Shattered Dream Blade. The youngest junior sister constantly boasts about dominating the world.
There is also a seemingly ordinary but actually ruthless female demon under her command.
what should I do?